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7e90c8e570
Now when both the vtimer and the ptimer when using both the in-kernel vgic emulation and a userspace IRQ chip are driven by the timer signals and at the vcpu load/put boundaries, instead of recomputing the timer state at every entry/exit to/from the guest, we can get entirely rid of the flush hwstate function. Signed-off-by: Christoffer Dall <cdall@linaro.org> Acked-by: Marc Zyngier <marc.zyngier@arm.com>
98 lines
3 KiB
C
98 lines
3 KiB
C
/*
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* Copyright (C) 2012 ARM Ltd.
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* Author: Marc Zyngier <marc.zyngier@arm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __ASM_ARM_KVM_ARCH_TIMER_H
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#define __ASM_ARM_KVM_ARCH_TIMER_H
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#include <linux/clocksource.h>
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#include <linux/hrtimer.h>
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#include <linux/workqueue.h>
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struct arch_timer_context {
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/* Registers: control register, timer value */
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u32 cnt_ctl;
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u64 cnt_cval;
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/* Timer IRQ */
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struct kvm_irq_level irq;
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/*
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* We have multiple paths which can save/restore the timer state
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* onto the hardware, so we need some way of keeping track of
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* where the latest state is.
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*
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* loaded == true: State is loaded on the hardware registers.
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* loaded == false: State is stored in memory.
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*/
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bool loaded;
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/* Virtual offset */
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u64 cntvoff;
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};
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struct arch_timer_cpu {
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struct arch_timer_context vtimer;
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struct arch_timer_context ptimer;
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/* Background timer used when the guest is not running */
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struct hrtimer bg_timer;
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/* Work queued with the above timer expires */
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struct work_struct expired;
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/* Physical timer emulation */
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struct hrtimer phys_timer;
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/* Is the timer enabled */
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bool enabled;
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};
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int kvm_timer_hyp_init(void);
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int kvm_timer_enable(struct kvm_vcpu *vcpu);
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int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu);
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void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
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void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu);
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bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu);
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void kvm_timer_update_run(struct kvm_vcpu *vcpu);
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void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);
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u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid);
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int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value);
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int kvm_arm_timer_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
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int kvm_arm_timer_get_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
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int kvm_arm_timer_has_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
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bool kvm_timer_should_fire(struct arch_timer_context *timer_ctx);
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void kvm_timer_schedule(struct kvm_vcpu *vcpu);
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void kvm_timer_unschedule(struct kvm_vcpu *vcpu);
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u64 kvm_phys_timer_read(void);
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void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu);
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void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu);
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void kvm_timer_init_vhe(void);
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#define vcpu_vtimer(v) (&(v)->arch.timer_cpu.vtimer)
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#define vcpu_ptimer(v) (&(v)->arch.timer_cpu.ptimer)
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void enable_el1_phys_timer_access(void);
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void disable_el1_phys_timer_access(void);
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#endif
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